In about 1998, I was driving down the highway in Mississippi and saw a tag: "UID ZRO". I had a passenger at the time and said hey, I'm going to pass this guy, but tell me if he looks like a Unix admin. Passenger was familiar with the type and said yes, he did.
I loved that plate, it looked cool in real life; and I kept it, it’s proudly hanging in my NL office now.